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Silence 3 static analysis warnings#3743

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StephanTLavavej merged 2 commits into
microsoft:mainfrom
StephanTLavavej:more-analysis
May 31, 2023
Merged

Silence 3 static analysis warnings#3743
StephanTLavavej merged 2 commits into
microsoft:mainfrom
StephanTLavavej:more-analysis

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@StephanTLavavej
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Followup to #3734.

I've filed a tracking bug VSO-1828677 "False positive warning C26450 (arithmetic overflow) in charconv and memory_resource" for the static analysis team to investigate, and @dmitrykobets-msft has added fully reduced repros there. Our code is correct, so we need to silence this warning until the compiler is fixed.

For locale::_Ptr, attempting to initialize it will break the STL catastrophically. I'm permanently suppressing the warning, with an explanation of the squirrelly 🐿️ behavior involved. In theory, this is not ABI-sensitive since classic_locale is isolated to the locale0.cpp TU, but iostreams is extremely complicated and fragile and I am not eager to mess with this logic at this time unless absolutely forced to.

@StephanTLavavej StephanTLavavej added the enhancement Something can be improved label May 31, 2023
@StephanTLavavej StephanTLavavej requested a review from a team as a code owner May 31, 2023 20:10
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I have speculatively mirrored this to MSVC-PR-475347 to fast-track it.

Comment thread stl/inc/xlocale Outdated
@StephanTLavavej StephanTLavavej merged commit c8d1efb into microsoft:main May 31, 2023
@StephanTLavavej StephanTLavavej deleted the more-analysis branch May 31, 2023 23:38
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